Cylinder and concave tooth for thrashing-machines



(No Model) P WHITE.

CYLINDER AND GONGAVE TOOTH FOR THRASHING MACHINES. No. 251,981. Patented Jan. 3,1882

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UNITED STATES Y PATENT OFFICE.

HENRY P. WHITE, OF PAW PAW, MICHIGAN.

CYLINDERANDCONCAVE TQ OTH FOR THRASH-lNG-MACHINES.

SPECIFICATION formingpart of Letters Patent No. 251,981, dated January 3, 1882.

I Applicationfiled October18,188l. (NomodeL) To all whom it may concern Be it known that I, HENRY P. WHITE, of Paw Paw, in the county of Van Buren and State of Michigan, have invented certain new and useful Improvements in Cylinder and Concave Teeth for Thrashing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which forms part of this specification, in which is represented in perspective a cylinder or concave tooth with my improvement attached to or inserted therein.

The object I have in view is to obviate the ditticulty experienced in thrashing grain by reasonof the straw getting crosswise or bent 5 and use my invention, I will now proceed to during the operation of the machine, and thereby impairing its perfect working.

My invention relates to teeth for thrashingmachines; and it consists in a cylinder or concave tooth provided with a cutting-blade, substantially as will be hereinaftermore fully set forth. I

To enable others skilled in the art to make describe its construction.

A represents a cylinder or concave tooth of the usual and well-known form. In thelower part of the. tooth, as seen in dotted lines, I

provide an inclined slot at an angle of about forty-five degrees, and in this slot I insert and properly secure the knife or cutting-blade B. This blade should be beveled or slightly rounded upon its cutting side, with its lower end straight and on a line with the end of the tooth. It is of course advisable to so secure the blades thatin the event of their becoming dull or broken they may be removed for repair. It will thus be seen that the straw and bands which lie in such a; position as will prevent them from being properly beaten will be out and the heads will be brought by the action of the cylinder in aposition to admit of their being thoroughly cleaned.

Having thus fully described my invention, whatI claim, and desire to secure by Letters Patent, is-

The combination, with a thrashing-machine cylinder or concave tooth, of a cutting-blade secured thereto, substantially for the purpose herein set forth.

In testimony that I claim the foregoing as my own I aflix my signature in presence of two witnesses.

HENRY P. WHITE.

Witnesses:

GHARLEs E. GALLIGAN, HIEAM A. COLE. 

